const createError = require('http-errors');
const express = require('express');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
const cors = require('cors');
const history = require('connect-history-api-fallback')
const jwtRules = require('./utils/jwtUtils')

const usersRouter = require('./routes/users');
const studentsRouter = require('./routes/students');
const teachersRouter = require('./routes/teachers');
const classRouter = require('./routes/class');
const fileRouter = require('./routes/fileUpload')
const homeRouter = require('./routes/home');

// 连接数据库
require('./utils/mongodb')

const app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

//解决跨域问题
app.use(cors())

// 处理history路由404问题
// app.use(history())

// 处理 jwt验证
app.use(jwtRules)

// 注册一级路由
app.use('/user', usersRouter);// http://localhost:4000/users
app.use('/students',studentsRouter);
app.use('/teachers',teachersRouter);
app.use('/class',classRouter);
app.use('/file',fileRouter);
app.use('/home',homeRouter);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
